AntennaMastsRus - 21" Black Antenna is Compatible with GMC Sierra 2500 (2006-2019) - Spiral Wind Noise Cancellation - Spring Steel Construction Fits: 2006-2019 GMC Sierra 2500 21" BLACK Tapered Antenna - Spring Steel Construction!! *** Wind Noise Canceling *** Features an external coil to cancel wind noise 100% Satisfaction Guarantee, Period! Order before 2PM CST, Same Day Shipping from Wisconsin!!!